219 results about "Coupling impedance" patented technology

The invention relates to a directional coupling communication apparatus where the coupling impedance can be easily matched to reduce reflections, and thus, the speed of communication channels is increased as compared to that with inductive coupling, and at the same time, the reliability of communication is improved by increasing the signal intensity. Modules having a coupler where an input / output connection line is connected to a first end, and either a ground line or an input / output connection line to which an inverse signal of a signal to be inputted into the input / output connection line connected to the above-described first end is inputted is connected are layered on top of each other so that the couplers are couplers to each other using capacitive coupling and inductive coupling.

Described are controllable termination impedances that may be adjusted collectively by a combination of digital and analog signals. Each adjustable impedance, responsive to the digital signals, establishes a gross termination resistance for one of a plurality of communication channels by enabling one or more of a plurality of parallel-coupled impedance legs. Each leg includes at least one transistor for controlling the impedance of the leg over a continuous range. An analog compensation voltage is level shifted and the resulting level-shifted signal is applied to the control terminals of the transistors of the selected impedance legs. The compensation voltage, and consequently the level-shifted signal, varies with supply-voltage and temperature fluctuations in a manner that causes the collective impedance of the selected legs for each channel to remain stable despite the fluctuations. The combination of digital and analog impedance control provides for coarse impedance adjustments, such as to compensate for process variations, and additionally provides fine, adaptive adjustments to maintain the selected impedance despite changes in the supply voltage and temperature.

The embodiment of the invention discloses a flexible circuit board and a display panel. The flexible circuit board comprises a main body part and an aided testing part connected with the main body part; multiple golden fingers are arranged on the main body part; each golden finger extends to a partition part at the connecting part of the main body part and the aided testing part; the partition part is used for separating the aided testing part from the flexible circuit board; each golden finger comprises at least a pair of testing bonding pads, one end of one testing bonding pad far away from the aided testing part is insulated from the one end of another testing bonding pad far away from the aided testing part; at least a pair of testing points are arranged on the aided testing part, and each testing point is electrically connected with the corresponding testing bonding pad. The flexible circuit board disclosed by the embodiment of the invention reduces the thickness of the display panel, and saves the internal space of the display panel; and the coupling impedance between the main flexible circuit board and the aided flexible circuit board or between the integrated circuit wafers can be precisely detected.

The invention discloses a V-shaped micro-strip meander-line slow wave structure, belongs to the technical field of microwave vacuum electronics, and relates to a traveling wave tube amplifier. The V-shaped micro-strip meander-line slow wave structure comprises a micro-strip transmission line structure consisting of a metal bottom plate (3), a dielectric layer (2) and a planar metal wire (1) and is characterized in that: the dielectric layer (2) is positioned between the metal bottom plate (3) and the planar metal wire (1); the planar metal wire (1) has a zigzag structure formed by connecting a plurality of sections of planar metal wires which have the same shape and dimension end to end; and the adjacent two sections of planar metal wires constitute a V shape or a reverse V shape, and the included angle 2theta of the V shape or reverse V shape is less than 180 degrees. The shape of the dielectric layer (2) can be the same as that of the metal bottom plate (3) or the planar metal wire (1). Compared with the conventional right-angle micro-strip meander-line slow wave structure, the V-shaped micro-strip meander-line slow wave structure has wider working band and higher coupling impedance and can further meet the requirements of an equipment system on the device in aspects of working bandwidth, output power, weight and volume.

The invention discloses a method for generating stable, full-time low noise laser output. The method includes the following steps: regulating and maintaining a semiconductor laser operating temperature by means of a thermoelectric controller (TEC) attached on the laser; generating a direct-current bias from a direct-current generator; generating an amplitude-modulatable radio frequency signal from a local oscillator; superposing the radio frequency signal onto the direct-current bias to generate amplitude-modulatable drive current; injecting the amplitude-modulatable drive current into the semiconductor laser by way of input-coupled impedance matching; regulating the direct-current bias by means of an automatic power control circuit; and optimizing the amplitude of the radio frequency signal. By modulating the driving of the semiconductor laser diode, the method effectively overcomes the mode hopping phenomenon, the method is applicable to laser diodes with various wavelengths, the generated laser output has the advantages of low coherence, low noise, little speckles, long-time stable output power and long-time uniform beam illumination, and the method is particularly suitable forbiomedicine and medical diagnosis and clinic.

An integrated RF circuit is disclosed having an RF input port and an RF output port. The RF output port is for being coupled with a known impedance to an external circuit element such as an antenna. At least an RF circuit element is disposed along a propagation path between the RF input port and the RF output port. The RF circuit element has a first input port and a first output port and is for affecting a signal received at the first input port and providing the affected signal to the first output port. The integrated RF circuit also has a VSWR detector circuit for measuring a ratio of a characteristic of RF signals at the first input port and a same characteristic of the RF signals at the first output port and for providing an indication of the ratio at a VSWR output port. The measured ratio of the characteristic is affected by an impedance of the coupling thereby providing an indication relating to the coupling.

The invention discloses a power-adjustable backward wave oscillator. The power-adjustable backward wave oscillator is characterized in that: by inserting upper and lower two rows of periodically complementary split-ring resonator structure into the middle part of a cavity of rectangular waveguide vertically, the complementary split-ring resonator structure has a relatively higher electric field resonant response at the slit of the opening, that is, between the horizontal branches of the two half parts, and shows the meta-material electromagnetic characteristic with a negative dielectric constant epsilon and a negative magnetic permeability Mu; longitudinal resonant field intensity is formed at the upper surface and lower surface of the periodically complementary split-ring resonator structure, thus being conductive to interaction between charged particles of band-shaped electron beams and electromagnetic waves; and at the same time, three electron beam channels are formed. Therefore, compared with a traditional relativism backward wave oscillator, the power-adjustable backward wave oscillator has higher coupling impedance and can obtain very high power output and electron efficiency. Besides, the structure enables one electron beam to work individually, or enables two electron beams or three electron beams to work, so that three kinds of adjustable power output of single beam, double beam and three-beam can be formed and then multi-band-shaped power can be adjustable.

The present invention relates to a transceiver for bidirectional frequency division multiplexed transmission, a communication system including one or more transceivers. Optionally, the communication system is a communication system for a digital subscriber line. The transceiver comprises transmission means with a voltage source output or a current source output for transmitting data in a transmission frequency range, receiving means for receiving data in a receiving frequency range, and a coupling impedance for connecting the transmission means and the receiving means to a transmission medium. The magnitude of the coupling impedance in the transmission frequency range is smaller than the magnitude of the coupling impedance in the receiving frequency range if the transmission means has a voltage source output and is higher than the magnitude of the coupling impedance in the receiving frequency range if the transmission means has a current source output.

A stereo headphone employing a standard stereo headphone plug is adapted for automatically hearing a monaural signal at both earpieces, when accessing a typical monaural source. In the first embodiment of the invention, an impedance element couples the signal from a first acoustical driver that receives the monaural signal from the stereo plug tip, to a second acoustical driver that is connected to the stereo plug ring and normally receives no signal when plugged into a conventional monaural audio source output jack. The magnitude of the coupling impedance is selected with respect to the impedance of the acoustical driver so that the reduction in loudness at the second earpiece due to the signal voltage drop across the coupling impedance is not perceptible to the listener. This will occur when the reduction in loudness at the second earpiece is less than the threshold of perceivable loudness reduction at one ear when there is no reduction in loudness at the other ear. The effect of the coupling impedance, when listening to a stereo audio source is insignificant, firstly, because the two stereo channel signals appear at their respective drivers with virtually no attenuation due to the coupling impedance. Secondly, although the coupling impedance does contribute a slight amount of additional crosstalk between the stereo channels, the magnitude of the increase in crosstalk is dependent upon the ratio of the coupling impedance to the output impedance of the stereo source. A typical stereo source for which the use of this headphone is intended has an output impedance so low compared to the coupling impedance that the increase in crosstalk is too small to be perceptible as affecting the stereo separation or the stereo imaging afforded by the stereo source. In the second embodiment of the invention two equal impedance elements couple the monaural signal from the stereo plug tip to each acoustical driver. This equalizes the loudness of the monaural signal heard at each earpiece and slightly reduces the level of one stereo channel with respect to the other. Crosstalk and stereo imaging are virtually unaffected, as with the first embodiment.

The invention relates to a circular-waveguide slow-wave structure for angularly loading spiral lines, which belongs to the technical field of vacuum electrons and comprises a circular waveguide, N identical spiral lines and two circular-ring medium sheets, wherein the radius of the circular waveguide is R1, the outer radii of the two circular-ring medium sheets are R1, and the inner radii of the two circular-ring medium sheets are R5; the two circular-ring medium sheets are respectively fixed on the two end surfaces of the circular waveguide, and the N identical spiral lines are all connected between the two circular-ring medium sheets, so that the N identical spiral lines are angularly and uniformly distributed inside the circular waveguide; and the hollow parts of the two circular-ring medium sheets and a space part surrounded by all the spiral lines together form an electron-beam passage. The circular-waveguide slow-wave structure can work at short millimeter-wave and terahertz-wave bands, the coupling impedance can be effectively improved, and a dispersion curve is more flat, so that a traveling-wave tube adopting the novel slow-wave structure has higher gain and interaction efficiency, and the larger output power is obtained; and in addition, the phase velocity can be greatly decreased in the invention, accordingly a lower working voltage can be adopted, and the circular-waveguide slow-wave structure is favorable to the miniaturization of devices.

The invention provides a rectangular-grooved loading winding waveguide slow wave line, relating to a travelling wave tube amplifying device in the technical field of microwave vacuum electronics. A series of arc (or right-angle) bend waveguides and straight waveguides are connected end to end to form a winding waveguide structure; each bend waveguide is inboard provided with an opening along the broadside direction of the waveguides; each opening position is connected with a rectangular groove; the whole winding waveguides and the chambers of the rectangular-grooves are mutually communicated; the central axis symmetric line of the winding waveguide structure, the straight waveguides walls and the rectangular-grooved walls are provided with circular through holes at the points of intersection thereof; then two through holes of all adjacent straight waveguide walls and rectangular-grooved walls are connected by metal tubes with the same aperture size as the aperture size of the circular through holes to form an electron bunch channel. In the invention, the rectangular grooves featuring periodic loading are used for improving field distribution in conventional winding waveguide slow wave line; the slow wave line of the invention, compared with ordinary slow wave line, has higher coupling impedance, higher power gain and output power and smaller volume.

A first connection circuit (108) is adjusted to cancel out mutual coupling impedance occurring between a first antenna element (106) in a first frequency band and a second antenna element (107) in a second frequency band, and reduces a degradation occurring due to the coupling between the antenna elements. A second frequency band cutoff circuit (111) for the second frequency band is provided between the first antenna element (106) and the first feeding portion (104).

The invention discloses a planar annular microstrip slow-wave structure which belongs to the field of microwave electric vacuum technology. The planar annular microstrip slow-wave structure relates to a traveling-wave tube amplifier device. The planar annular microstrip slow-wave structure comprises a dielectric substrate (2) and metal wires (1) on the surface of the dielectric substrate (2). The planar annular microstrip slow-wave structure is characterized in that each metal wire (1) has a periodical structure which is obtained through successively connecting a plurality of annular units with same shape and same dimension. Each annular unit is obtained through joining two open rings which are in mirror symmetry in a vertical direction. Two adjacent annular units are connected at a joining part between the two open rings through a microstrip line. Compared with an existing microstrip slow-wave structure, the planar annular microstrip is advantageous in that a vacuum device with the planar annular microstrip slow-wave structure can be used in a higher operating frequency band on condition of same dimension because of wider cold bandwidth. The planar annular microstrip slow-wave structure provided by the invention has a wide transverse dimension, thereby effectively reducing a requirement for an electronic gun and a focusing magnetic field. The planar annular microstrip slow-wave structure has a relatively high coupling impedance and can perform interaction with an electron beam in a relatively good manner. Therefore the planar annular microstrip slow-wave structure has relatively high potential and is suitable for miniature planar traveling-wave tubes.

The invention relates to a ridge loading zigzag waveguide slow wave line which belongs to the technical field of microwave vacuum electrons and relates to a traveling wave tube amplification device. The device is formed by connecting a series of arc bending waveguides (or right-angle bending waveguides) and straight waveguides end to end, i.e. bending rectangular waveguides into a U-shaped zigzagline (or a right-angle zigzag line) periodically along the electric field surface, so as to form a zigzag waveguide structure. A metal ridge sheet with a certain thickness is loaded on the inner wallsof the straight waveguides of each zigzag unit, and the waveguide walls and the metal ridge sheets are provided with round through holes along the position of a middle axle symmetric line of a slow wave structure, wherein the round through holes of the straight waveguides of two adjacent zigzag units are connected through a metal pipe with an aperture size the same as the aperture size of the round through hole so as to form an electron bunch passage. The invention can improve the coupling impedance of a zigzag waveguide slow wave system, thereby ensuring that a zigzag waveguide traveling wave tube has higher gain and efficiency.

The invention discloses a grid-connected inverter frequency coupling impedance characteristic extraction method based on multi-sine-wave signal injection. The method comprises the steps: adopting an impedance measuring device based on a model predictive control method to realize the low-impedance characteristic in a broadband range; decomposing the multi-input and multi-output frequency coupling impedance characteristics of the grid-connected inverter into four single-input and single-output subsystems and performing independent measurement; measuring the broadband frequency coupling impedancecharacteristics of the grid-connected inverter through one-time signal injection, so enough measurement precision and rapidity are ensured. Compared with an existing frequency coupling impedance characteristic extraction method, the frequency coupling impedance characteristic extraction method has the advantages that the impedance characteristic extraction efficiency is remarkably improved whilethe measurement precision is guaranteed, and faster and more efficient frequency coupling impedance characteristic extraction can be achieved.

A communications network, a HVAC system employing a communications system and a method of manufacturing a component for the HVAC system are disclosed. In one embodiment, the communications network includes: (1) a dominant node having a predetermined coupling impedance and (2) a plurality of end nodes coupled to the dominant node, each of the plurality having an end node coupling impedance, wherein a total of each the end node coupling impedance and the predetermined coupling impedance is substantially a defined maximum loading impedance for the communication network.

The invention provides a novel half-cycle staggered double-gate slow-wave structure, which comprises rectangular gates and an electron injection channel, wherein the rectangular gates are in half-cycle staggered arrangement on two wide edges of a rectangular waveguide; the electron injection channel is arranged at the center of the rectangular waveguide and runs through the rectangular waveguide along the axis direction of the rectangular waveguide; and the rectangular gates are intersected with the electron injection channel, so that the coupled impedance is improved; and the novel half-cycle staggered double-gate slow-wave structure is applicable to improvement of the gain and the efficiency of a terahertz device.

The invention discloses a flat-topped sine waveguide slow wave structure. The size b of a narrow side is compressed appropriately on the basis of a sine waveguide slow wave structure, and the compression size is equal to the height of periodical strip fluctuation cut-tops of upper and low sine lines, so that the size parameter meets the condition that b is smaller than the sum of hb and 2h, wherein hb is the height of a sheet electron beam channel and h is the height of periodical strip fluctuations of the sine lines. Tests show that the flat-topped sine waveguide slow wave structure has a higher coupling impedance value, the dispersion characteristic is improved, increase of traditional coupled impedance is prevented, the defect that the dispersion characteristic is reduced is overcome, the interactive capacity between electron beams and electromagnetic waves is improved, and the output power, the gain and the interaction efficiency of traveling-wave tubes are improved.

The invention discloses an identification method for a sub-synchronous / super-synchronous coupling impedance (admittance) model of a power device. The identification method for the impedance model comprises the steps of providing the sub-synchronous / super-synchronous coupling impedance model of the power device; connecting the power device into a power grid, applying sub-synchronous / super-synchronous excitation to the power grid, and obtaining sub-synchronous and super-synchronous voltage components and current components of the power device based on the sub-synchronous / super-synchronous coupling impedance model; changing sub-synchronous / super-synchronous excitation parameters or parameters of an external power grid, thereby obtaining multiple groups of measurement results of the power device, and generating an impedance measurement equation according to the multiple groups of measurement results; and carrying out a preset numerical optimization method on the impedance measurement equation to obtain impedance parameters of the sub-synchronous / super-synchronous coupling impedance model. The method has the advantages that the indivisibility between complementary frequency dynamic states of two relatively working frequencies is represented, and the sub-synchronous / super-synchronous resonance and vibration problems of a power system are analyzed and explained well.

The invention relates to a directional coupling-type multi-drop bus of which the impedance is matched with the bus at the time of coupling so that the speed is increased. A directional coupler is formed when a second module provided with a second coupler end is mounted on a first module provided with a first coupler end, and as a result, the coupling impedance where the proximity effects in the coupling state of the directional coupler are reflected is matched with the impedance of the bus.

A system and method for identifying turn faults in a stator of a motor are provided. The method includes determining a normalized cross-coupled impedance from the symmetrical components of measured voltages and currents of the motor. Additionally, the normalized cross-coupled impedance may be normalized to a negative sequence impedance. The negative sequence impedance may be determined through a regression analysis using parameters of the motor, such as line-to-line voltage, horsepower, and number of poles. A system is provided that includes a device having a memory and processor configured to determine a normalized cross-coupled impedance, compare the normalized cross-coupled impedance to one or more thresholds, and trigger and alarm and / or trip the motor.

The invention discloses a slow wave structure used for an X-waveband space travelling wave tube. A tube shell adopts a Monel tube shell with the inner diameter of 1.9 millimeters, a holding rod is made of a wedge-shaped BeO99 material, the slow wave structure adopts a high-pure vacuum smelted molybdenum helix of 0.13mm*0.26mm, the helix at the output section of the slow wave structure has a plurality of sections with different thread pitches, and a two-section carbon film attenuator is selected for inhibiting self-oscillation. The slow wave system has the advantages of large coupling impedance, strong heat dissipation capability, high interactive efficiency and the like, and is suitable for the space travelling wave tube.

The invention relates to a slow wave structure of a folding frame, and the structure belongs to the technical field of microwave electric vacuum devices. The structure comprises an upper metal bottom plate and a lower metal bottom plate (2 and 1) which have the same shape and size and are in parallel with each other; medium layers (3 and 4) are respectively arranged on the opposite surfaces of the upper metal bottom plate and the lower metal bottom plate; metal microstrip lines (5 and 6) are respectively arranged on the opposite surfaces of the medium layers (3 and 4); the upper and the lower metal microstrip lines (5 and 6) have the same line width, are respectively folded periodically, and are mutually in mirror symmetry; and folding top points which correspond to the upper and the lower metal microstrip lines (5 and 6) are connected by metal connecting wires (7). Compared with the existing slow wave structure of a symmetric double V-shaped microstrip line, according to the slow wave structure of the folding frame, the inside of a whole working frequency band is provided with a higher coupling impedance value, so that the gain and the efficiency of a traveling wave tube can be further improved. Meanwhile, the manufacturing of the slow wave structure of the folding frame can be realized through a microfabrication technology, and the structure has wide application prospect.

The invention discloses a slow wave structure of a coplanar waveguide, wherein the slow wave structure of the coplanar waveguide belongs to the technical field of microwave electrovacuum and relates to a travelling wave tube amplifier device. The slow wave structure of the coplanar waveguide comprises a dielectric substrate (2) and a metal layer (1) on the surface of the dielectric substrate (2). The metal layer (1) comprises a central conduction band and grounded metal surfaces at two sides of the central conduction band. The shape of the central conduction band is a periodical bent curve. The central conduction band is isolated from the grounded metal surfaces at two sides. The slow wave structure of the coplanar waveguide can effectively settle a problem of electron accumulation on a microstrip slow wave structure, and serial connection or parallel connection with other microwave devices is easily realized, thereby easily realizing small size and integration of a vacuum device. The vacuum device with the structure of the invention has relatively low working voltage, and the coupling impedance curve and the dispersion curve are relatively flat, thereby realizing wide frequency band of the vacuum device and reducing gain fluctuation of the vacuum device in the working frequency band. Therefore the slow wave structure of the coplanar waveguide has relatively high potential and is suitable for a miniature planar travelling wave tube.

The invention discloses a three-phase asymmetric power frequency parameter actual measuring method of a high-voltage transmission line. The actual measuring method comprises the following steps: 1) the matching end three phases are short-circuited and then grounded; a single phase test power source is implemented between any two phase lines at the measuring end; the other phase is idle; and voltage and current of each phase are measured; 2) the matching end three phases are short-circuited and then grounded; any two phase lines are connected in parallel at the measuring end, and a single phase test power source is implemented between the parallel connected two phase lines and the third phase line, and the voltage and the current of each phase are measured; 3) the matching end three phases are short-circuited and then grounded; a single phase test power source is implemented between any phase of the measuring end and the ground; the other two phases are idle; and the voltage and the current of each phase are measured; 4) a quasi-impedance equation is constructed to obtain the line impedance matrixes; and 5) the line impedance matrixes are subjected to mathematical transform to obtain positive-sequence, negative-sequence, and zero-sequence impedances and coupling impedance between sequences. The measuring method is simple and practical, can eliminate the high-induced voltage interference and influence from three-phase asymmetry to the line parameter measurement, and improves the precision of the line parameter measurement.

The invention discloses a frequency domain identification method and system of a sub / super synchronous coupling impedance model of an electric power system. The system comprises a disturbance signal generation module, a data acquisition module and an impedance model identification module. The disturbance signal generation module is used for generating disturbance signals and injecting the disturbance signals to a port of an electric power device. The data acquisition module is used for acquiring real-time voltage data and real-time current data at the port of the electric power device. The impedance model identification module is used for identifying the acquired voltage data and the acquired current data to obtain the sub / super synchronous coupling impedance model of the electric power system. The method and the system are advantageous in that the sub / super synchronous coupling impedance model of the electric power system can be completely measured; models corresponding to multiple sub / super synchronous frequencies can be continuously measured; operation is simplified to a certain degree; workload is reduced; large quantity of repeated work is avoided; a transmission function expression of a coupling model can be obtained through identification of the coupling model of multiple groups of discrete frequency points; analysis of vibration risks in the whole electric grid system is facilitated.

A stereo headphone employing a standard stereo headphone plug is adapted for automatically hearing a monaural signal at both earpieces, when accessing a typical monaural source. In the first embodiment of the invention, an impedance element couples the signal from a first acoustical driver that receives the monaural signal from the stereo plug tip, to a second acoustical driver that is connected to the stereo plug ring and normally receives no signal when plugged into a conventional monaural audio source output jack. The magnitude of the coupling impedance is selected with respect to the impedance of the acoustical driver so that the reduction in loudness at the second earpiece due to the signal voltage drop across the coupling impedance is not perceptible to the listener. This will occur when the reduction in loudness at the second earpiece is less than the threshold of perceivable loudness reduction at one ear when there is no reduction in loudness at the other ear. The effect of the coupling impedance, when listening to a stereo audio source is insignificant, firstly, because the two stereo channel signals appear at their respective drivers with virtually no attenuation due to the coupling impedance. Secondly, although the coupling impedance does contribute a slight amount of additional crosstalk between the stereo channels, the magnitude of the increase in crosstalk is dependent upon the ratio of the coupling impedance to the output impedance of the stereo source. A typical stereo source for which the use of this headphone is intended has an output impedance so low compared to the coupling impedance that the increase in crosstalk is too small to be perceptible as affecting the stereo separation or the stereo imaging afforded by the stereo source. In the second embodiment of the invention two equal impedance elements couple the monaural signal from the stereo plug tip to each acoustical driver. This equalizes the loudness of the monaural signal heard at each earpiece and slightly reduces the level of one stereo channel with respect to the other. Crosstalk and stereo imaging are virtually unaffected, as with the first embodiment.

The invention discloses a one-side folded waveguide slow wave structure for a backward wave oscillator. Curved waveguides on one side of a folded waveguide are arranged in symmetrical positions along a midline. The one-side folded waveguide slow wave structure particularly structurally comprises a straight waveguide array consisting of a plurality of straight waveguides and a plurality of curved waveguides, wherein every two adjacent straight waveguides are connected via one curved waveguide to form a periodic structure; and an electron beam channel penetrates through the straight waveguide array. According to the one-side folded waveguide slow wave structure, the curved waveguides on one side are transferred to the symmetric positions along the midline, so that fundamental waves of the slow wave structure are forward waves; and the backward wave oscillator can achieve appropriate working voltage and higher coupling impedance simultaneously by using the one-side folded waveguide slow wave structure.

The invention discloses a quasi-coaxial zigzag sheet beam slow-wave structure, which comprises a metal shell, a metal slow-wave line and two dielectric support rods, wherein the metal shell is dividedinto an inner layer and an outer shell, the inner layer adopts a zigzag waveguide structure, an electron beam channel is strip-shaped, the bending between two adjacent ridge sheets of the zigzag waveguide structure is provided with an opening; the metal slow-wave line is obtained by folding a metal line, the folding path is the same as the folding path of the zigzag waveguide structure of the inner layer of the metal shell, and an identical electron beam channel is set; and the two dielectric support rods are respectively fixed between the inner layer and the outer layer at two sides of the metal shell, and the side surfaces of the dielectric support rods are partially exposed from the openings set on the zigzag waveguide structure and performs surface contact with the metal slow-wave line so as to clamp the metal slow-wave line and enable the metal slow-wave line to be suspended in an inner cavity of the metal shell. The quasi-coaxial zigzag sheet beam slow-wave structure can reducethe dispersion characteristics and improve the coupling impedance under the premise of ensuring high bandwidth.